| Hydrothermal Sedimentation Characteristics of the Dajiangping Superlarge Pyrite Deposit,Yunfu,Guangdong |
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| 作者姓名： | 陈多福 陈光谦 |
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| 作者单位： | [1]GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640 [2]GuangzhouInstituteofGeochem,ChineseAcademyofSciences,Guangzhou510640 |
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| 摘 要： | The Dajiangping pyrite deposit is hosted in a carbonate-clastic rock series which is characterized by a bioreef-chert suite in its middle part.Conformable lenses of various sizes constitute the orebodies which often branch transitionally into the surroundings.Syngenetic deformation fabrics can be observed in orebody NO.3.Orebody No.4 is composed almost entirely of massive pyrite,with conspicuous hydrothermal sedimentation and bacterium-alga features.The hydrothermal sedimentation origin is also reflected by simple chemistry of the ore (predominated by quartz and pyrite),the presence of U and Th,and the REE compositions of pyrite and ankerite.The ores are rich in organic matter and the difference in organic content between the banded ores and the massive ores is mainly owing to the difference in the clastic components they contain rather than to the subsequent processes of reworking .Co/Ni rations in the ore may reflect the temperature pattern during hydrothermal sedimentation.
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| 关 键 词： | 黄铁矿矿床 热液沉降作用 碳酸盐岩 元素地球化学 广东 |
Hydrothermal sedimentation characteristics of the Dajiangping superlarge pyrite deposit, Yunfu, Guangdong |
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| Chen Duofu,Chen Guangqian,Pan Jingming,Ma Shaogang,Dong Weiquan,Gao Jiyuan,Chen Xianpei.Hydrothermal Sedimentation Characteristics of the Dajiangping Superlarge Pyrite Deposit,Yunfu,Guangdong[J].Chinese Journal of Geochemistry,1998,17(4):331-337. |
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| Authors: | Chen Duofu Chen Guangqian Pan Jingming Ma Shaogang Dong Weiquan Gao Jiyuan Chen Xianpei |
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| Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou |
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| Abstract: | The Dajiangping pyrite deposit is hosted in a carbonate-clastic rock series which is characterized by a bioreef-chert suite
in its middle part. Conformable lenses of various sizes constitute the orebodies which often branch transitionally into the
surroundings. Syngenetic deformation fabrics can be observed in orebody No. 3. Orebody No. 4 is composed almost entirely of
massive pyrite, with conspicuous hydrothermal sedimentation and bacterium-alga features. The hydrothermal sedimentation origin
is also reflected by simple chemistry of the ore (predominated by quartz and pyrite), the presence of U and Th, and the REE
compositions of pyrite and ankerite. The ores are rich in organic matter and the difference in organic content between the
banded ores and the massive ores is mainly owing to the difference in the clastic components they contain rather than to the
subsequent processes of reworking. Go/Ni ratios in the ore may reflect the temperature pattern during hydrothermal sedimentation.
This project was financially supported by the National Natural Science Foundation of China (No.49572114) and the key project
B of the Chinese Academy of Sciences (KZ 952-S1-435). |
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| Keywords: | pyrite deposit hydrothermal sedimentation ore-controlling rock assemblage element geochemistry Guangdong Province |
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